Jelle Bakker describes the complex courses as a “hobby”.
On Sunday, a video of coloured balls racing through a sand course was shared by numerous Facebook pages and quickly gained millions of views.
The video was lifted from YouTube page Jelle’s Marble Runs. The page is run by Jelle Bakker, a 32-year-old from Amersfoort, Holland.
Bakker has been running the account for 10 years, updating it regularly with amazing videos of marble runs and ball courses he has built himself.
He has made sand courses, sky rails, and hosted a marble world cup.